[英]Python/Pygame mouse position does not update (blit function)
我正在嘗試使用Pygame制作一個簡單的菜單,但是我發現,每當我使用pygame.mouse.get_position時,它確實會弄亂我想要的東西,但是我必須不斷移動鼠標以使我的圖片保持閃爍狀態。
import pygame
import sys
pygame.init()
screen = pygame.display.set_mode((800,600))
pygame.display.set_caption('cursor test')
cursorPng = pygame.image.load('resources/images/cursor.png')
start = pygame.image.load('resources/images/menuStart.jpg')
enemy = pygame.image.load('resources/images/enemy-1.png')
white = (255,255,255)
black = (0,0,0)
clock = pygame.time.Clock()
FPS = 60
while True:
screen.fill(white)
pygame.mouse.set_visible(False)
x,y = pygame.mouse.get_pos()
x = x - cursorPng.get_width()/2
y = y - cursorPng.get_height()/2
screen.blit(cursorPng,(x,y))
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_ESCAPE:
pygame.quit()
sys.exit()
elif event.type == pygame.MOUSEMOTION:
if x < 50 and y < 250:
screen.blit(enemy,(100,100))
clock.tick(FPS)
pygame.display.update()
怎么了?
看一下您的代碼:
for event in pygame.event.get():
...
elif event.type == pygame.MOUSEMOTION:
if x < 50 and y < 250:
screen.blit(enemy,(100,100))
您檢查事件,如果您檢測到鼠標(並且僅此后)被移動,則將圖像繪制到屏幕上。
如果即使不移動鼠標也要繪制圖像,則只需停止檢查MOUSEMOTION
事件,然后總是繪制圖像即可:
while True:
screen.fill(white)
pygame.mouse.set_visible(False)
x,y = pygame.mouse.get_pos()
x = x - cursorPng.get_width()/2
y = y - cursorPng.get_height()/2
screen.blit(cursorPng,(x,y))
if x < 50 and y < 250:
screen.blit(enemy,(100,100))
for event in pygame.event.get():
...
您需要將“曲面”和“矩形”拖入屏幕。
首先,使用我用於加載圖像的代碼段。 確保圖像正確加載:
def loadImage(name, alpha=False):
"Loads given image"
try:
surface = pygame.image.load(name)
except pygame.error:
raise SystemExit('Could not load image "%s" %s' %
(name, pygame.get_error()))
if alpha:
corner = surface.get_at((0, 0))
surface.set_colorkey(corner, pygame.RLEACCEL)
return surface.convert_alpha()
其次,當您獲得Surface時,請像這樣獲得其矩形:
cursorSurf = loadImage('resources/images/cursor.png')
cursorRect = cursorSurf.get_rect()
然后,在更新中執行以下操作:
cursorRect.center = pygame.mouse.get_pos()
最后,像這樣流血到屏幕:
screen.blit(cursorSurf, cursorRect)
現在,您將注意到鼠標的正確渲染,而無需移動鼠標。
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